Laundry Chigasaki is located in Kanagawa Prefecture’s Atsugi City, which is often seen on road signs but little-known. Staffed by 25-year-old part-timer Nagumo Nagi and owner-manager, this strange coin laundry somewhere in the city provides ironing and laundry folding service. One day, when Nagi is folding clothes, something unexpected falls out from the pocket. At a glance, it appears to be a handkerchief, but is rather thick, smooth and also has a slight sheen. Nagi and the owner are curious about what this is. On examination, they discover that it is the scraps of bloomers! The two of them naturally decide to cross-examine its salaryman owner, Yamada Tadashi, but …